Fennel is used to warm the kidneys and liver, move qi and relieve pain (by regulating the body’s qi mechanism to relieve pain), and harmonize the stomach. Fennel is a traditional Chinese medicine that warms the kidneys, warms the liver, relieves pain by regulating the body’s qi and harmonizes the stomach. It is used in treating cold pain in the epigastric region (cold pain in the stomach and abdomen), abdominal distension and pain in the abdominal region, abdominal pain in the abdomen, abdominal pain in the cold hernia (acute abdominal pain caused by coldness in the internal organs and coldness in the wind), dysmenorrhea, and eructation (hiccups) due to cold in the middle jiao and cold and stagnation of the qi in the liver meridian. Fennel is pungent in flavor, warm in nature and fragrant in aroma, which can warm the kidneys, get rid of coldness, regulate qi, comb the liver, and disperse the cold in the lower Jiao to relieve pain, and it is a commonly used traditional Chinese medicine for the treatment of abdominal pain and hernia pain. It is contraindicated for those who are suffering from internal heat and yin deficiency (deficiency of yin and essence in the body, resulting in hyperactive fire). Fennel is a traditional Chinese medicine, such as the need for medication is recommended to be used under the guidance of a traditional Chinese medicine practitioner to identify the evidence, unauthorized use of medication may cause adverse consequences.